Flow Meter Home > Products > Type & Technology > QuadraTherm Mass Flow Meters

Worlds Highest Accuracy Thermal Mass Flow Meters

QuadraTherm 640i/780i

The QuadraTherm 780i inline version achieves accuracy of +/- 0.5% of reading, making it the most accurate thermal meter in the world. Before QuadraTherm, this level of accuracy was never thought possible by any thermal dispersion mass air/gas flow meter manufacturer.

View Selection Chart     Visit Microsite

QuadraTherm is the first four-sensor thermal mass air flow meter ever designed—three precision platinum temperature sensors and one patented DrySense™ mass flow velocity sensor backed by a lifetime warranty.

QuadraTherm benefits include:

  • Change gas with Dial-A-Gas® technology
  • Change pipe size with Dial-A-Pipe® technology in the field and
  • Multi-gas flow totalizer totalizes up to four gases with one device and software package
  • qMix™ gas mixing software creates custom gas mixtures in the field to compensate for gas compositional changes—all without returning the meter to the factory for recalibration
  • Boiler MACT certified for area source boilers (40 CFR 63, subpart JJJJJJ) and for major source boilers (40 CFR 63, subpart DDDDD) Learn More
  • View by:
QuadraTherm® 640i

Industry's Most Accurate Air / Gas Thermal Insertion Mass Flow Meters

  • Achieve high accuracy +/- 0.75% of reading
  • Eliminate drift with patented DrySense™ sensor
  • Validate in the field for easy in-situ calibration
  • Use qMix software to easily change gas composition in the field and retain accuracy
  • Backed by lifetime sensor warranty
  • Boiler MACT certified for area source boilers (40 CFR 63, subpart JJJJJJ) and for major source boilers (40 CFR 63, subpart DDDDD) Learn More
QuadraTherm® 780i

Highest Air/Gas Mass Flow Measurement Accuracy in Industry

  • Achieve the highest accuracy +/- 0.5% of reading
  • Eliminate drift with DrySense sensor
  • Reduce straight-run requirements with built-in flow conditioning
  • Needs only 1-diameter up and zero downstream diameters
  • Validate in the field for easy in-situ calibration
  • Backed by lifetime sensor warranty
  • Boiler MACT certified for area source boilers (40 CFR 63, subpart JJJJJJ) and for major source boilers (40 CFR 63, subpart DDDDD) Learn More
qMix™ Gas Mixing Feature

Field-Update For Gas Composition Changes

  • Powerful, gas mixing software to create custom gas mixtures in the field
  • Free BETA trial with every QuadraTherm® thermal mass flow meter
  • Maintain flow meter accuracy if gas composition changes
  • No need to send unit back to the factory if gas composition changes
  • Avoid costly recalibration

We're sorry, your filter request has no results. Please try again.